Ketene Chemistry 2.1 A General Procedure for the Synthesis of 2-Alkoxycyclopropane-carboxylic Esters and Acids Starting from Aldehydes and Ketene

Preben Bødstrup Rasmussen; Søren Bøwadt

doi:10.1055/s-1989-27165

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Synthesis 1989; 1989(2): 114-117
DOI: 10.1055/s-1989-27165

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Ketene Chemistry 2.¹ A General Procedure for the Synthesis of 2-Alkoxycyclopropane-carboxylic Esters and Acids Starting from Aldehydes and Ketene

Preben Bødstrup Rasmussen^* , Søren Bøwadt

^*Research Department, A/S Cheminova, P. O. Box 9, DK-7620 Lemvig, Denmark

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Publication Date:
17 September 2002 (online)

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Alkyl 3-alkoxy-4-bromocarboxylates are prepared by the Lewis acid-catalyzed reaction of α-bromoaldehyde acetals with ketene. Base-catalyzed cyclization of these intermediates affords 2-alkoxycyclopropanecarboxylic esters.